def test_ctuple(self):
from six.moves import range
from xoutil.functools import ctuple
def echo(*args):
return args
result = compose(echo, ctuple, list, range, math=False)(10)
expected = (0, 1, 2, 3, 4, 5, 6, 7, 8, 9)
self.assertEqual(expected, result)
# Without ctuple prints the list
result = compose(echo, list, range, math=False)(10)
expected = ([0, 1, 2, 3, 4, 5, 6, 7, 8, 9], )
self.assertEqual(expected, result)
def __init__(self, name, bases, attrs):
from xoutil.names import nameof
from xoutil.functools import compose
OperatorType.operators.append(self)
_PROVIDES = (' This {which} directly provides '
':class:`xotl.ql.interfaces.{interface}`.\n\n')
doc = ''
for attr, trans in (('arity', lambda x: nameof(x, inner=True)),
('_method_name', repr),
('_format', compose(str, repr))):
value = getattr(self, attr, None)
if value:
v = trans(value).replace('_', r'\_')
v = v.replace("'", '"')
doc += ('\n\n - **{attr}:** {v}'.format(attr=attr,
v=v))
if doc:
self.__doc__ = ((self.__doc__ if self.__doc__ else '') +
'\n\n **Attributes**:' + doc)
doc = ''
interfaces = (IOperator, )
if getattr(self, '_rmethod_name', False):
interfaces += (ISyntacticallyReversibleOperation, )
if 'ISyntacticallyReversibleOperation' not in self.__doc__:
doc += _PROVIDES.format(
which='class',
interface='ISyntacticallyReversibleOperation')
if getattr(self, 'equivalence_test', False):
interfaces += (ISynctacticallyCommutativeOperation, )
if 'ISynctacticallyCommutativeOperation' not in self.__doc__:
doc += _PROVIDES.format(
which='class',
interface='ISynctacticallyCommutativeOperation')
if doc:
self.__doc__ += '\n\n **Interface(s)**:\n\n' + doc
directlyProvides(self, *interfaces)
def test_simple_case(self):
incr = lambda x: x + 1
add_3 = compose(incr, incr, incr)
self.assertEqual(3, add_3(0))
def test_only_callables(self):
with self.assertRaises(TypeError):
compose(1)
def test_single_argument_is_identitical(self):
def anything():
pass
self.assertIs(anything, compose(anything))
def test_needs_at_least_an_argument(self):
with self.assertRaises(TypeError):
compose()
